Stahlwille M16 XZN 1/2" drive — heavy-truck + bus driveline, large-engine crank bolts. Installed in hydraulic power packs, deck machinery, mobile equipment and industrial press applications.
| Part | 13020016 |
| Profile | XZN triple-square (12-point star) |
| Size | M16 XZN |
| Drive | M16 / 1/2" |
| Material | Cr-V |
| Standard | DIN 3121 |
| Uses | VW/Audi/Porsche engine bolts (head/main/rod/flywheel), BMW/MB driveshaft + suspension, heavy-truck driveline |
| Material | Cr-V |
| Primary standard | DIN 3121 |
| MOQ | 1 |
Triple-square (XZN) profile patented by Volkswagen for high-torque fastening. Do NOT use 6-point hex or 12-point spline in XZN fasteners — will strip. Accurately fits recessed-hex + flush-top socket-head variants.